1
Published: 2003.
2
Published: c2008.
Superior document: The Ohlin lectures
3
Published: 2004.
Superior document: National Bureau of Economic Research conference report
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4
Published: c1984.
Superior document: A National Bureau of Economic Research conference report
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5
Published: 1991.
Superior document: A National Bureau of Economic Research conference report
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6
Published: c1988.
Superior document: A National Bureau of Economic Research conference report
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7
Published: c1998.
Superior document: Studies in income and wealth ; v. 59
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